Study on the risk assessment of water inrush of karst deep mines in Northeast Yunnan, China

In response to the issue of water inrush risk assessment in large water inrush mines after grouting curtain renovation in karst environments, combined with subjective and objective weight methods, this paper proposed a comprehensive water inrush evaluation model using analytic hierarchy process (AHP) and entropy weight method (EWM), which is applied to the risk assessment of water inrush in mining large water inrush mines in Southwest China.7 factors are selected to construct a water inrush evaluation index system.The subjective and objective weights of water inrush evaluation indicators are calculated using AHP and EWM, respectively.Combined the weight of water inrush evaluation indicators, the GIS is used to draw a water inrush risk zoning map.The results indicate that the model can classify the risk of water inrush in the study area into four levels.In comparison with the field, it is found that the distribution of water inrush points is consistent with the water inrush zoning, with high accuracy.This model can provide a new approach for evaluating water inrush during mining of karst aquifers.